Energy Loss of Cosmic Rays in the Interplanetary Medium
- 21 September 1970
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 25 (12) , 832-835
- https://doi.org/10.1103/physrevlett.25.832
Abstract
The expansion of the solar wind is likely to cause low-energy cosmic-ray particles to lose a significant fraction of their energy in the interplanetary medium. It is shown that because of this effect, most of the protons observed below ∼100 MeV and alpha particles below ∼60 MeV/nucleon originate at higher energies, making it impossible to sample directly the interstellar spectra at these energies.Keywords
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